<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Title</title>
	<style type="text/less">
		@mw:~"min-width: 720px";
		.app{
			color:red;
		}
		@media screen and (@mw){
			.app{
				color:green;
			}
			
		}
		@media screen and (min-width: 960px){
			.app{
				color:blue;
			}
			
		}
	</style>
	<script src="lib/less.min.js"></script>
</head>
<body>
	<div class="app">
		最近比较烦。好多人说我长的很丑！
	</div>
</body>
</html>